# Archive Retrieval — Base-100 Series + Two-Measure Correlation

> Archive Retrieval — Base-100 Series + Two-Measure Correlation is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-23).

Computes a Base-100 index series and a two-measure Pearson/rank correlation between retrieved_pages and attempted_pages for up to 200 supplied archive retrieval rows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-web-22-165?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/archive-retrieval-base-100-series-two-measure-correlation-4cc8dbd0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NyuDeT773LNWBakU1S4NR

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability archive-retrieval-base-100-series-two-measure-correlation-4cc8dbd0 -d '<json body>'
```

Example prompt: I have up to 200 rows of archive retrieval data with retrieved_pages and attempted_pages per site group and date — can you run a Base-100 series indexed from row 0 on the retrieved_pages field, plus a two-measure correlation between retrieved_pages and attempted_pages across all rows?

## When to prefer this

Choose this endpoint when you have pre-collected archive retrieval tabular data (up to 200 rows) and need both a normalized Base-100 time series and a statistical correlation between retrieved and attempted page counts in a single low-cost call ($0.01 USDC). It is purely analytical with no live lookups, making it ideal for offline batch audit workflows where you supply your own data and want two complementary statistical views without paying for separate API calls.

## Known failure modes

- Rows array exceeds 200 items — request rejected
- Missing required fields (row_id, date, retrieved_pages, attempted_pages) — validation error
- Invalid date format (must be YYYY-MM-DD) — schema validation failure
- base_index out of range 0–199 relative to provided rows — error
- Null values in both metric columns for all rows — correlation undefined
- Single-row input — correlation not computable

## How this service works

Archive retrieval — Base-100 series + Two-measure correlation: Base-100 series + Two-measure correlation for supplied archive retrieval records (retrieved_pages, attempted_pages). Up to 200 rows; 2 independent reports using shared local analytical engines. No live lookup, prediction, professional assessment or external action. 0.01 USDC includes 2 supplied-data reports for up to 200 rows.

## Output

Returns two analytical reports: (1) a Base-100 index series where each row's selected metric (retrieved_pages or attempted_pages) is expressed relative to the baseline row scaled to 100, and (2) a two-measure correlation report showing the statistical relationship between retrieved_pages and attempted_pages across all supplied rows. Results are computed locally with no external lookups.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "row_id",
     "site_group",
     "date",
     "retrieved_pages",
     "attempted_pages"
    ],
    "properties": {
     "date": {
      "type": "string",
      "default": "",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "maxLength": 10
     },
     "row_id": {
      "type": "string",
      "default": "",
      "maxLength": 80,
      "minLength": 1
     },
     "site_group": {
      "type": "string",
      "default": "",
      "maxLength": 80
     },
     "attempted_pages": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "retrieved_pages": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "date": "2026-10-01",
     "row_id": "row-1",
     "site_group": "group-a",
     "attempted_pages": 1,
     "retrieved_pages": 10
    },
    {
     "date": "2026-10-02",
     "row_id": "row-2",
     "site_group": "group-b",
     "attempted_pages": 2,
     "retrieved_pages": 20
    },
    {
     "date": "2026-10-03",
     "row_id": "row-3",
     "site_group": "group-a",
     "attempted_pages": 3,
     "retrieved_pages": 15
    },
    {
     "date": "2026-10-04",
     "row_id": "row-4",
     "site_group": "group-b",
     "attempted_pages": 4,
     "retrieved_pages": 30
    }
   ],
   "maxItems": 200,
   "minItems": 1
  },
  "field": {
   "enum": [
    "retrieved_pages",
    "attempted_pages"
   ],
   "type": "string",
   "default": "retrieved_pages"
  },
  "base_index": {
   "type": "integer",
   "default": 0,
   "maximum": 199,
   "minimum": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/archive-retrieval-base-100-series-two-measure-correlation-4cc8dbd0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)